Mesoporous carbon @TiO2 core-shell spheres and preparation method thereof

A technology of mesoporous carbon and core-shell spheres is applied in the field of mesoporous carbon@TiO2 core-shell spheres and their preparation, which can solve the problems of low solar photocatalytic efficiency and small specific surface area, and achieve the effect of simple and easy method.

Inactive Publication Date: 2019-08-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently, carbon and TiO 2 Heterojunction materials are mainly simple composites of the two, most carbon and TiO 2 The specific surface area of ​​heterojunction materials is small, and photogenerated electrons-holes are easy to recombine, so the solar photocatalytic efficiency is low

Method used

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  • Mesoporous carbon @TiO2 core-shell spheres and preparation method thereof
  • Mesoporous carbon @TiO2 core-shell spheres and preparation method thereof
  • Mesoporous carbon @TiO2 core-shell spheres and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] A Mesoporous Carbon@TiO 2 The preparation method of core-shell sphere comprises the following steps:

[0028] 1) Mix ethylene glycol and acetone at a mass ratio of 2:1 to obtain solution A;

[0029] 2) Add mesoporous carbon spheres with a particle size of 306nm into solution A, and ultrasonically disperse them uniformly to obtain suspension B;

[0030] 3) Add tetrabutyl titanate to suspension B, the mass ratio of tetrabutyl titanate to mesoporous carbon spheres is 5:1, and obtain suspension C after ultrasonic dispersion;

[0031] 4) Transfer the suspension C to a magnetically stirred high-pressure reactor with a filling degree of 50% and a magnetic stirring speed of 300r / min, and react at 150°C for 12 hours to obtain the solvothermal product D;

[0032] 5) The solvothermal product D was centrifuged, washed with deionized water and ethanol, dried at 80°C for 12 hours, and ground to obtain mesoporous carbon @TiO 2 Core-shell spheres, mesoporous carbon @TiO 2 The SEM a...

Embodiment 2

[0034] A Mesoporous Carbon@TiO 2 The preparation method of core-shell sphere comprises the following steps:

[0035] 1) Mix ethylene glycol and acetone at a mass ratio of 2:1 to obtain solution A;

[0036] 2) Add mesoporous carbon spheres with a particle size of 306nm into solution A, and ultrasonically disperse them uniformly to obtain suspension B;

[0037] 3) Add tetrabutyl titanate to suspension B, the mass ratio of tetrabutyl titanate to mesoporous carbon spheres is 10:1, and obtain suspension C after uniform ultrasonic dispersion;

[0038] 4) Transfer the suspension C to a magnetically stirred high-pressure reactor with a filling degree of 50% and a magnetic stirring speed of 350r / min, and react at 160°C for 14 hours to obtain the solvothermal product D;

[0039] 5) The solvothermal product D was centrifuged, washed with deionized water and ethanol, dried at 80°C for 12 hours, and ground to obtain mesoporous carbon @TiO 2 Core-shell spheres, mesoporous carbon @TiO 2 ...

Embodiment 3

[0041] A Mesoporous Carbon@TiO 2 The preparation method of core-shell sphere comprises the following steps:

[0042] 1) Mix ethylene glycol and acetone at a mass ratio of 3:1 to obtain solution A;

[0043] 2) Add mesoporous carbon spheres with a particle size of 306nm into solution A, and ultrasonically disperse them uniformly to obtain suspension B;

[0044] 3) Add tetrabutyl titanate to suspension B, the mass ratio of tetrabutyl titanate to mesoporous carbon spheres is 5:1, and obtain suspension C after ultrasonic dispersion;

[0045] 4) Transfer the suspension C to a magnetically stirred high-pressure reactor with a filling degree of 80% and a magnetic stirring speed of 400r / min, and react at 180°C for 18 hours to obtain the solvothermal product D;

[0046] 5) The solvothermal product D was centrifuged, washed with deionized water and ethanol, dried at 90°C for 20 hours, and ground to obtain mesoporous carbon @TiO 2 Core-shell spheres, mesoporous carbon @TiO 2 The SEM a...

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Abstract

The invention discloses a preparation method of mesoporous carbon @TiO2 core-shell spheres. The preparation method comprises the following steps: (1) dissolving ethylene glycol in acetone so as to obtain a solution A; (2) adding particle size-controllable mesoporous carbon spheres to the solution A, and performing ultrasonic uniform dispersion so as to obtain a suspension B; (3) adding tetrabutyltitanate to the suspension B, and performing ultrasonic uniform dispersion so as to obtain a suspension C; (4) transferring the suspension C to a magnetic stirring hydrothermal reaction kettle, and performing a solvothermal reaction on reactants under the condition of magnetic stirring so as to form a solvothermal product D; and (5) performing centrifugation on the solvothermal product D, and performing water washing, drying and grinding so as to obtain the mesoporous carbon @TiO2 core-shell spheres. The thickness of a mesoporous carbon @TiO2 core-shell sphere layer is regulated through changeof the ratio of the reactants so that the mesoporous carbon @TiO2 core-shell spheres with different shell thickness are prepared, the method is simple and easy, and the product has high visible lightabsorption capacity and a visible light catalysis effect.

Description

technical field [0001] The invention relates to the field of synthesis of core-shell materials, in particular to a mesoporous carbon @TiO 2 Core-shell sphere and its preparation method. Background technique [0002] TiO 2 Based heterojunction photocatalytic materials are widely used in photocatalytic hydrogen production, CO 2 Reduction and pollutant degradation field, where carbon and TiO 2 Heterojunction materials exhibit excellent photocatalytic properties in the field of solar photocatalysis and have received extensive attention. [0003] Currently, carbon and TiO 2 Heterojunction materials are mainly simple composites of the two, most carbon and TiO 2 The specific surface area of ​​heterojunction materials is small, and photogenerated electrons-holes are easy to recombine, so the solar photocatalytic efficiency is low. Contents of the invention [0004] The purpose of the present invention is to provide a mesoporous carbon @TiO 2 Method for preparing core-shell ...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J35/08
CPCB01J21/18B01J35/397B01J35/23B01J35/51B01J35/39
Inventor 杨艳玲陈华军和茹梅孙瑜陈志刚邹鑫鑫锁国权叶晓慧张荔朱建锋冯雷毕雅欣侯小江
Owner SHAANXI UNIV OF SCI & TECH
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